[BUG] Unable to change Language from "fr" to "en" if gwd cgi started with -blang

[michelmno]

Unable to change Language from "fr" to "en" if gwd cgi started with -blang

use case

• geneweb built from geneweb/master current head (cid 19918c0)
• gwd cgi script started with -blang parameter
  (as per online help this is to Select the user browser language if any
• from welcome page of the base, my default browser is french, and the page correctly displayed as such.
  http://localhost/cgi-bin/gwtst?b=basefusionnee
• if I try to switch to "en" for english language, the welcome page remains in french, and url remains the same without lang= variable.
• What is strange is that if I select another language (like es for spanish) then the page is correctly translated and url updated also http://localhost/cgi-bin/gwtst?lang=es&b=basefusionnee

There is no such problem if -blang parameter not present.

Something else about language translation: the Welcome page of demo 7.1 on wiki is a mixed of english and french while my browser is french; nevertheless reports the same problem as above.
https://demo.geneweb.tuxfamily.org/gw71/gwd?b=grimaldi

[a2line]

blang should not be intrusive anymore when switching to "en" (english) with merge of PR #1680 that also allows to setup a “fallback langage”.

[michelmno]

verified OK with master branch cid 99b5157